Question

Which of the following relation is called as current density ?

• A. $\frac{I^{2}}{A}$
• B. $\frac{A}{I}$
• C. $\frac{I^{3}}{A^{2}}$
• D. $\frac{I}{A}$

Answer 1

Answer: (D)

$\frac{I}{A}$

Answer 2

If a current I in a conductor is uniformely distributed over the area of crosssection (A) of the conductor, then the ratio I/A is called the current density at any point on the area. It is represented by joule. Its unit is amp/m and it is a vector quantity.